Sure if you think ideas would be helpful
For achievement based players
Goals, Milestones, Achievements, Chronicled History, Player written Timeline, Build to X Height, Build a Kingdom Wall.
For social players
Social events, Families, Houses, Roleplaying Communities, Gatherings, In game Books and Libraries, Musical Skill System (which I hope gets some depth) for taverns.
For Pkers
Arenas, Gladiator Leagues, King of the Hill Events (Knock Down)
For Explorers
Rare Finds, Naming Landmarks, Discovering Rare Breeds, Recipes. A University of Magic Investigation for example, which has the goal of finding out everything there is to know about the unknown.
Hope it helps. What ideas do you have?